|
1) You'll want an administrative IP address for each system base. And
then at least one IP address for each system base that cluster
services will use to communicate. You could share the administrative
IP but I wouldn't call that "Best Practices". Then, if on the same
layer 2 VLAN, you'll want an IP that your users will connect with. It
will be a cluster resource that can be active when the iASP is active.
2) The synch will be done when you restore data into the source system
iASP. Cluster replication (or storage replication if you're using it)
will synchronize the blocks. Anything in the target iASP will be
written over when cluster is setup. There is no "priming the pump".
3) The system name can be the same. Cluster services uses the node name.
The RDB name will be assigned to the iASP and follow where the iASP is
running.
Hopefully that's a good start! Good luck
Patrick Bingham | Principal, Converged Infrastructure Architect
Office: 402-965-2381 | Mobile: 402-212-2944
patrick.bingham@xxxxxxxxxxxxx Sirius Computer Solutions |
www.siriuscom.com
14301 FNB Parkway, Suite 400, Omaha, NE 68154
-----Original Message-----
From: Evan Harris [mailto:auctionitis@xxxxxxxxx]
Sent: Wednesday, May 06, 2015 5:38 PM
To: Midrange Systems Technical Discussion
Subject: PowerHA for i questions
Hi All
I have been doing some research into PowerHA for a possible Proof of
Concept implementation. Most of my reading has been in the
"Implementing PowerHA for IBMi" and PowerHA SystemMirror for IBM i Cookbook" redbooks.
The scenario I am looking at initially is using two guest LPARs on two
Power 7 machines as a proof of concept. I know how to build a guest
LPAR and also have the IASP side of things under control but I do have
a couple of questions that I have not been able to find in the reference material.
1. What are the network requirements (if any) and how do I set up the
network for failover
Do I assign one address that the cluster group then uses to direct
traffic to the live node, or do I do something like change the DNS
entry to point the host name to a different IP address ? Or some other approach ?
2. How do I initially synch up the IASP's
Do I have to do a save and restore of the IASP or the library
contents, or do I need to let the Cluster perform a some kind of synch
operation ? Will restoring the data into the target IASP make this any quicker ?
3. Can I have the same system name (SNA system name) on both nodes in
the cluster ?
I ask this last question simply out of curiousity as a customer I am
dealing with has software that they insist must have a specific system
name to function. I don't think this is ideal, nor do I think it will
work but I can't think of a specific reason why it won't. I suspect
the cluster group won;t allow to nodes to have the same system name
but haven;t been able to verify this so far.
If anyone can give me some pointers on these questions or point me at
some other reference material that would be great.
--
Regards
Evan Harris
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